What are the applications of ceramic Pall rings?

The shape of the ceramic pall ring is designed to overcome the shortcomings of the ceramic raschig ring in industrial applications, and great structural improvements have been made in the research and development of the ceramic pall ring. Its structure is based on a cylindrical ring, with eight small windows on the outer wall forming eight tongues that bend inward toward the center of the ring, arranged in two layers. The positions of the upper and lower window openings are staggered. This symmetrical ring structure prevents the packing from easily reacting with other materials. Compared with the raschig ring, the porosity is significantly increased, which also improves the masstransfer performance of the ceramic pall ring.

The gasliquid separation efficiency of the ceramic pall ring is greatly enhanced, with uniformly distributed voids. The efficiency is improved by a factor of five, while maintaining a relatively low pressure drop, and liquid no longer follows the original channeling path. Meanwhile, the risk of vessel surge is reduced, and gasliquid separation is more effective. Even when used in large vessels, the operating pressure of ceramic pall ring packing can be much lower and more balanced than usual. The large surface area and open pores allow gas to pass through with low resistance, resulting in much higher throughput than before.

In actual chemical industry production, ceramic pall rings can be used in vessels scrubbed with acidic liquids to filter out excess gas where liquid concentrations are high, and they play an important role in ozonerelated reactions. They are also used in other types of vessels, such as drying towers, regeneration towers, and cooling towers, to achieve excellent masstransfer performance. In addition, ceramic itself offers acid and alkali resistance, good corrosion resistance, and high heat resistance, making it increasingly widely used in packed towers.